9

我一直在研究将多个数据库与 CodeIgniter 一起使用。如果我提前知道数据库是什么，那么我可以在配置文件中设置信息，然后调用我需要的任何数据库组。

但是，在我的情况下，我需要将该数据库信息存储在另一个数据库中。它是一种主数据库，其中包含有关客户的一般信息，包括存储客户数据的数据库和凭据。然后，该供应商可以随时添加客户，并将每个客户的数据隔离在不同的数据库中。

如何根据从 CodeIgniter 中的主数据库返回的值设置数据库和凭据，或者甚至有办法做到这一点？

谁能指出我正确的方向？提前感谢您的任何建议。

4

4 回答 4

10

从文档（https://www.codeigniter.com/user_guide/database/connecting.html）：

该函数的第一个参数可以选择用于从配置文件中指定特定的数据库组，或者您甚至可以为配置文件中未指定的数据库提交连接值。

所以你会做这样的事情，用主数据库中的值替换值：

$config['hostname'] = "localhost";
$config['username'] = "myusername";
$config['password'] = "mypassword";
$config['database'] = "mydatabase";
$config['dbdriver'] = "mysql";
$config['dbprefix'] = "";
$config['pconnect'] = FALSE;
$config['db_debug'] = TRUE;
$config['cache_on'] = FALSE;
$config['cachedir'] = "";
$config['char_set'] = "utf8";
$config['dbcollat'] = "utf8_general_ci";

$this->load->database($config);

如果您需要维护与主数据库和客户数据库的连接，则将最后一行更改为：

$customer_db = $this->load->database($config, TRUE);

// to use the master database:
$this->db->query("SELECT * FROM my_table");

// to then use the customer database:
$customer_db->query("SELECT * FROM whatever");
于 2013-03-11T21:07:05.427 回答
7

将主数据库设为默认数据库，将客户设为第二个数据库
$active_group = 'default'; $active_record = TRUE;

    $db['default']['hostname'] = '';
    $db['default']['username'] = '';
    $db['default']['password'] = '';
    $db['default']['dbdriver'] = '';
    $db['default']['dbprefix'] = '';
    $db['default']['pconnect'] = TRUE;
    $db['default']['db_debug'] = TRUE;
    $db['default']['cache_on'] = FALSE;
    $db['default']['cachedir'] = '';
    $db['default']['char_set'] = 'utf8';
    $db['default']['dbcollat'] = 'utf8_general_ci';
    $db['default']['swap_pre'] = '';
    $db['default']['autoinit'] = TRUE;
    $db['default']['stricton'] = FALSE;

    $db['secondDatabase']['hostname'] = '';
    $db['secondDatabase']['username'] = '';
    $db['secondDatabase']['password'] = '';
    $db['secondDatabase']['dbdriver'] = '';
    $db['secondDatabase']['dbprefix'] = '';
    $db['secondDatabase']['pconnect'] = TRUE;
    $db['secondDatabase']['db_debug'] = TRUE;
    $db['secondDatabase']['cache_on'] = FALSE;
    $db['secondDatabase']['cachedir'] = '';
    $db['secondDatabase']['char_set'] = 'utf8';
    $db['secondDatabase']['dbcollat'] = 'utf8_general_ci';
    $db['secondDatabase']['swap_pre'] = '';
    $db['secondDatabase']['autoinit'] = TRUE;
    $db['secondDatabase']['stricton'] = FALSE;

您可以通过以下方式将第二个数据库加载到控制器或模型中

$DB2 = $this->load->database('secondDatabase', TRUE);
于 2013-03-12T05:10:01.630 回答
3

/** 配置/数据库.php **/

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = '';
$db['default']['username'] = '';
$db['default']['password'] = '';
$db['default']['dbdriver'] = '';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = (ENVIRONMENT !== 'production');
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

/** 你的控制器或模型 **/

//by default the master database will be loaded and you can directly access db using      $this->db 
   $result = $this->db->query("SELECT * FROM `your_table`")->limit(1)->get()->result();



$config['dbxyz']['hostname'] = $result->hostname;
$config['dbxyz']['username'] = $result->username;
$config['dbxyz']['password'] = $result->password;
$config['dbxyz']['dbdriver'] = '';
$config['dbxyz']['dbprefix'] = '';
$config['dbxyz']['pconnect'] = TRUE;
$config['dbxyz']['db_debug'] = (ENVIRONMENT !== 'production');
$config['dbxyz']['cache_on'] = FALSE;
$config['dbxyz']['cachedir'] = '';
$config['dbxyz']['char_set'] = 'utf8';
$config['dbxyz']['dbcollat'] = 'utf8_general_ci';
$config['dbxyz']['swap_pre'] = '';
$config['dbxyz']['autoinit'] = TRUE;
$config['dbxyz']['stricton'] = FALSE;

//load database config
$this->config->load('database');

//Set database config dynamically        
$this->config->set_item('dbxyz', $config);

//Now you can load the new database using
$this->dbxyz = $this->load->database('dbxyz');

注意：有关更多详细信息，请参阅配置类 Codeigniter 文档

于 2013-03-12T09:29:54.930 回答
1

在 application\config\database.php 中添加以下行

$db['mydb2']['hostname'] = 'localhost';
$db['mydb2']['username'] = 'root';
$db['mydb2']['password'] = '';
$db['mydb2']['database'] = 'ci2';
$db['mydb2']['dbdriver'] = 'mysql';
$db['mydb2']['dbprefix'] = '';
$db['mydb2']['pconnect'] = TRUE;
$db['mydb2']['db_debug'] = TRUE;
$db['mydb2']['cache_on'] = FALSE;
$db['mydb2']['cachedir'] = '';
$db['mydb2']['char_set'] = 'utf8';
$db['mydb2']['dbcollat'] = 'utf8_general_ci';
$db['mydb2']['swap_pre'] = '';
$db['mydb2']['autoinit'] = TRUE;
$db['mydb2']['stricton'] = FALSE;

现在我们在控制器和模型中使用我们的第二个数据库，如下所示。

$CI = &get_instance();
$this->db2 = $CI->load->database('mydb2', TRUE);
$qry = $this->db2->query("SELECT * FROM employee");
print_r($qry->result());

我参考了http://www.tutsway.com/use-multiple-db-connections-in-codeigniter.php 。它对我有用。

于 2015-04-26T11:44:04.800 回答